Pioneer M-22

June
1 9 7 6 june 1976
1 9 8 0
Plus
1980+

The Pioneer M-22 is the original power amplifier from the Series 20 : old style Class A with no circuit trickery or audiophile touches - except where it really counts : power transformers, capacitors, resistors, chassis and ground paths.
The M-22 is a sound bolid.

"Open-guts" style with massive diecast heatsinks and chassis, four 33,000µF caps, full dual-mono layout.
If you don't mind having loudspeaker cables running in front of your rig... not very tidy.

But if you have an M-22 just for its sound qualities... all's fine : good-looking box that acts as room-heater on the side and ultimately makes wonderful music.




The dedicated japanese catalog is now at hand (2011) but nowhere near being translated...
A real M-22 here.

Pioneer M-22, image 1 Pioneer M-22, image 2 Pioneer M-22, image 3
Pioneer M-22 specifications
Title Value
Class A power : 2x 30W (20Hz...20Khz, 8 Ohm)
2x 30W (10Hz...30Khz, 4 Ohm)
THD : < 0,01% (10Hz...30Khz, 8 Ohm, rated power)
< 0,005% (10Hz...30Khz, 8 Ohm, 15W)
< 0,005% (10Hz...30Khz, 8 Ohm, 1W)
IMD : < 0,01% (20Hz...20Khz, 8 Ohm)
Power bandwidth : 10Hz...30Khz (full power)
Frequency response : 2Hz...150Khz (+0 / -1dB)
S/N ratio : 106dB
Damping factor : 60 (20Hz...20Khz)
Inputs : 1V / 50kOhm
PC : 280W (original models)
240W (export models)
Dimensions : 42 x 15,3 x 37cm
Weight : 22kg.
List price : 120,000¥ (1976)
Pioneer M-22 : 0 topic
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page online since : july 2008
page updated : not yet
page type : LGT / KNB
page weight : 218.15 Kb / 0 b

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